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The police warrant implies he was the pale, pudgy man with a squeaky voice known as the Visalia Ransacker, a serial prowler, voyeur and burglar behind a staggering 120 break-ins in less than two years.

Between March 1974 and late 1975, he plagued the then tiny town of Visalia in California's San Joaquin Valley, 340km north of Los Angeles.

The files make the eerie connection between DeAngelo and the crimes in that he trained in 1974 for his police job at the Kings County Public Safety Academy.

The academy was on the grounds of the College of the Sequoias in Visalia and was the epicentre of the streets plagued by the Ransacker.

Golden State Killer photofits in his various alleged criminal pasts, which were all in California and near where DeAngelo lived.

Another woman at home with her two daughters woke at 3.15am to the sound of wind chimes by her bedroom window.

She saw the silhouette of a man trying to pry open her screen and sat up, after which one of her girls woke.

The pair went to the kitchen to use the phone and as they were standing there, they heard a curtain rod fall to the floor.

A man appeared in front of them with a club in one hand and a gun in the other.

He was naked from the waist down.

He told them to freeze or he would kill them, tried to tie one of them up, struck her with the club and then fled next door.

The attacker then moved on to couples, tying up the husband while he took the wife to another room and raped her.

The warrant documents consider that "phase one" of the East Area Rapist's grip on Sacramento came to an end on February 2, 1978.

"Shortly after 9pm, USAF Sgt Brian Maggiore and his wife Katie, 20, took their dog for a walk in Cordova Meadows, the quiet middle class subdivision of Rancho Cordova in which they lived," the warrant reads.

"The area they walked was very dark. Only a quarter moon, a few porch lights, and a couple of residential light posts at the edge of an occasional driveway provided illumination.

"At the time Cordova Meadows was heavily prowled and burglarised and was the location of several sexual assaults."

At some point, the couple were assailed by a man, and perhaps chased in a violent encounter.

A neighbour "described the violent encounter … and watched as they ran … through a section of fence that had been blown down.

"Brian Maggiore was subsequently located in suffering from a gunshot wound that rendered him unable to speak.

"At the crime scene where both Brian and Katie were shot, a single pre-tied shoelace was located a few feet from where Brian was lying.

"Brian and Katie Maggiore were each transported to area hospitals where they died as a result of the gunshot wounds".

Phase one was over, phase two had begun.

The burglaries and stalking would continue but police were now looking for a killer.

When he attacked, he was fearless and the brutality, meticulous planning and sadistic rapes that characterised the man later known as the Golden State Killer would become a hallmark.

The warrant document lists an astonishing number of personal items taken from victims by the Visalia Ransacker, East Area Rapist and Golden State Killer.

Most is jewellery, and the Californian district attorney states it "believes DeAngelo will still be in possession of these items", but does not say whether they were found at his house after his April arrest.

But the authorities preparing to arrest the pension-aged DeAngelo, who was living with relatives at Citrus Heights just 15km from his alleged old killing ground, had other clues to match apart from DNA and murder trophies.

"In the years following the completion of all crimes committed by DeAngelo, he would have accessed updated attempts to identify him," the warrants reads.

"He would have used electronic devices … to locate media updates.

"Serial killers and rapists often keep journals or diaries of their criminal activity."